Container wall for a container covered by a foil and outer formwork for producing the container wall

ABSTRACT

A container wall for storing and fermenting materials, comprising a clamping channel, having an undercut near the upper edge that is open for clampingly receiving a rim of at least one plastic foil that covers the container at the top, the clamping channel comprises a narrowed lateral insertion slot with an upper and a lower protrusion, to which the foil can be wrapped around. A lower wall of the clamping channel is wider than the thickness of the clamping rail at the facing longitudinal edge which is formed as a flat profile, the upper wall of the clamping channel is at least twice as wide as the thickness of the clamping rail. The insertion profile can be inserted into the clamping channel through the entry. When the foil that is wrapped around the insertion profile is under tension, the insertion profile is retained in the clamping channel by the protrusions.

CROSS-REFERENCE TO RELATED APPLICATIONS

Not applicable.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH

Not applicable.

BACKGROUND OF THE INVENTION

The invention relates to a container wall according to claim 1 or 3 and an outer formwork for producing the container wall according to claim 22.

Container for storing and fermenting of ferments, for example in so-called biogas plants have considerable dimensions. They are mostly designed silo-like and thus have mostly a circular base. The wall is for example cast from concrete and the sealing to the top is often realized by a roof shaped foil, which is held in a tense and raised state by gas production or by a introduction of compressed air. For the secure fixation of the foil at the rim to the container wall, it is also known to install a clamping profile to the upper outer portion of the wall, into which the foil can be inserted and be affixed by the use of a clamping tube.

From DE 10 64 869 A it is known, to insert the rim of a foil that seals a container to the top into a circumferential slot that has a U-shaped cross section and subsequently inserting an inflatable tube in order to fixate the rim of the foil. From DE 10 2006 035 227 B3 it is known, to attach a gas container as well as a covering hood from foil material in a C-shaped rail that is mounted to the outside of the container, wherein a clamping tube is inserted to the rail for the fixation of the foil inside the rail.

Depending on the prevailing gas pressure in the container, the supporting air pressure or the external influences, corresponding tensile forces are introduced into the rail via the foil. There is therefore the risk that the foil slips out of the rail due to a deformation of the clamping profile or a lack of clamping force.

This can as well be counteracted in practice by solid flanging of the foil(s) to the container. The foil can be loaded until disruption. Disadvantageous is the additional effort for opening the cover, for example for maintenance purposes. In addition the cover can lose its function when the foil ruptures, which must be avoided.

BRIEF SUMMARY OF THE INVENTION

The objective of the invention is to create a container wall for a container with a device for fixating a foil made of plastic material that seals the container roof-like at the top, which can easily be manufactured and assembled and especially also can withstand high tensile forces at the foil. A further objective is to create a simple outer formwork for a container wall.

For the inventive container wall, which is preferably made of concrete, at the top section a clamping channel is provided that is open to the outside with a preferably lateral insertion slot, which height is less than the height of an oblong insertion profile, to which the foil can be wrapped around, that can be inserted into the clamping channel. According to an embodiment of the invention the lower wall of the clamping channel is just slightly wider than the thickness of the insertion profile at the facing longitudinal edge which is, for example formed as a flat profile, while the upper wall of the clamping channel is at least twice as wide as the thickness of the flat profile at the facing longitudinal edge. The insertion profile with the foil wrapped around is tilted towards the insertion slot through this inserted into the clamping channel and subsequently for example placed into a vertical position, so that with tensile forces at the foil it is pressed from inside against the protrusions which limit the insertion slot. High tensile forces can be absorbed with the help of such a construction without facing the risk that the foil slips out of the clamping channel. According to an embodiment of the invention the insertion profile comprises a predetermined breaking point, wherein it bents essentially around a horizontal axis when a predetermined maximal force acts on the foil. The insertion profile is preferably made of flat material, for example from sheet steal or plastic. It can be formed as a flat strip or bent or broken or it can be a more or less flat profile strip. The flat strip can have a rectangular, trapezoidal or angular cross section.

Depending on the pressure conditions in the container and the wind force that acts on the roof foil considerable tensile forces are exerted on the foil rim. The risk is therefore, that the foil rim is being pulled out when the tensile forces exceed a certain value. This risk is increased, when the angle of the foil rim to the associated leg of the rail-shaped clamping profile takes up a larger value, so that the leg undergoes a deformation and is bent upwards and the traction between foil rim and clamping profile is reduced.

In one solution it is ensured that especially for higher tensile forces on the foil the tensile force acting on the facing upper leg essentially introduced as a compression force to the leg and acts only as a smaller bending moment on the leg. Thus there is no disadvantageous deformation of the clamping profile with the result that the foil rim is being pulled out.

Viewed in the cross section, the insertion slot of the clamping channel lies in a plane, which is obliquely directed downward, which means it lies in an acute angle to the overlying container wall. If the pressure in the container increases, this leads to a raising of the roof foil, whereby the angle is increased. This reduces the pull-out force at the clamping profile. By a tilting of the clamping profile, however a greater pull-out resistance is acquired. The foil rim for example extends in an angle of 30° to 45° to the horizontal. The leg of the clamping profile facing the foil rim preferably extends in the same angle. Thus, with the invention also with higher values of the pull-out force a secure anchorage of the foil rim is assured.

In an embodiment of the invention the clamping channel or the clamping profile respectively is formed by profile rail, which is U-shaped or preferably C-shaped in the cross section and preferably arranged tilted. The container wall is preferably formed from concrete and the rail can be cast into the concrete wall.

Alternatively such a profile rail can be mountable to the outside of the container wall. There are different design options. According to an embodiment of the invention one option is, that vertical mounting sections are attachable in intervals on the outside of the container wall, which preferably comprise a recess adapted to the cross section of the rail, in which the profile rail is inserted tilted and fixed, preferably by welding. The rail that is preferably made of longitudinal sections, which are subsequently connected to each other, is first bent and than positively connected to the mounting sections. These are then connected to the container wall, for example by suitable anchors. In a further embodiment of the invention in this regard it is intended, that the mounting section is U-shaped in the cross section, wherein the recess is formed in the legs and the web of the mounting section is connectable with the container wall.

Alternatively, a holding means comprise an angle profile, which is for example welded to the rail, wherein the angle profile is mountable to the outer wall of the container.

The clamping profile in the form of a profile rail which is preferably C-shaped in the cross section, can be cast into the container wall. In this solution according to the invention a high pull-out force can be also obtained, if the clamping profile is arranged a certain distance to the upper edge of the container wall. A deformation of the leg of the rail facing the foil rim is no risk.

In a further embodiment of the invention the upper edge or the upper leg of the profile rail is flush with the top of the container wall. In a further embodiment of the invention, the top of the container wall can rise towards the outside.

If the clamping profile or the profile rail respectively is cast to the container wall in a distance to the top of the container wall, the outer upper edge of the wall is rounded according to a further embodiment of the invention. In this way the foil is not loaded as much.

As already indicated, the invention is particularly advantageous, if the profile rail is in a tilted position, to increase the pull-out force and to reduce the bending load at the associated leg respectively. At the profile rail mounted to the outside of the wall, the upper leg is loaded with the tensile force of the foil in particular. The tensile force produces a bending moment. The tilted arrangement allows an extension of the leg of the profile rail facing the foil in a direction approximately parallel to the foil or in only a small angle to it. Thus a small-scale profile rail can be used to achieve the same pull-out forces as in conventionally mounted profile rails whose insertion slot is for example in the vertical or whose upper leg forms a larger angle to the foil respectively. With an integration of a profile rail into the material of the container wall the thickness of the material of the profile rail, which is preferably formed from flat material, can be very small, since the forces are largely absorbed by the surrounding material of the container wall. Also with the arrangement of the profile wall in recesses of vertical mounting sections it is ensured that a significant resistance is opposing the bending of the upper leg of the profile rail, whereby the risk of pulling out the foil rim is considerably reduced.

The invention is also related to an outer formwork for the production of a container wall from concrete. With the help of a formwork a clamping profile can be easily produced in the concrete wall. According to the invention, one option is that a profile rail which is U- or C-shaped in the cross section is detachably mountable to the outer formwork elements, wherein the connection between these parts is accessible from the outside. When filling the formwork with concrete, the profile rail is automatically embedded in the wall. Before removing the formwork, the connection of the other formwork with the profile rail is released. The profile rail can also be mounted to a formwork, so that the upper leg is approximated to the extension direction of the foil or its insertion slot in the cross section respective extends in a plane that is obliquely directed downward.

In general according to the invention it is also possible, to form the clamping profile by a suitable positive profile on the outer formwork. Synthetic material used for the positive profile can be removed with heat and/or chemical substances, so that a clamping channel is formed in the wall for the fixation of the foil rim with a suitable clamping element. The clamping element is either an inflatable clamping tube or the already mentioned insertion profile to which the foil rim is wrapped around. In the event of a tensile force the foil rim together with the clamping element is applied against the inside of the clamping profile or its protrusions in the area of the insertion slot.

According to an embodiment of the invention the attachment means comprise at least one hole at the top of the formwork elements as well as a plug- or screw connection for a profile holder, which in turn is designed so that it temporarily fixates a profile rail or a formwork rail to the formwork element before filling in the concrete and after filling the concrete a profile rail or a formwork rail can be brought out of engagement with the formwork element by releasing the attachment means and tilting movement with the profile rail or the formwork rail respectively. For this purpose the profile holder can comprise a first sheet-metal portion, which in an approximately right angle to the insertion slot engages behind the foil limiting protrusions of the profile rail or of the formwork rail from the inside and comprising a transversally thereto disposed second sheet-metal portion, which is placeable on top of the formwork and comprises a mounting hole that is aligneable to the hole in the formwork element. The plug connection can comprise a pin as well as a clamping portion for the clampingly fixation of the second sheet-metal portion at the top of the formwork element by rotation of pin and clamping element.

Finally, below the top of the formwork element and below the clamping profile or the formwork profile respectively a C-shaped running rail, which is composed of individual running rail elements can be connected to the formwork element to embed the running rail in the concrete of the container wall. Such a running rail allows the attachment of a carriage at the outside of the container wall, wherein it is suspended from rollers that roll in the running rail. Such a design possibly spares the attachment of a platform extending around the container. The running rail elements can be connected to the profile rail elements at the outset, preferably by welding.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

Below embodiments of the invention are illustrated by drawings in greater detail.

FIG. 1 a shows a schematic plan view of a container.

FIG. 1 b shows a section through the illustration according to FIG. 1 along the line 2-2.

FIG. 2 shows a detail III according to FIG. 1 b for the fixation of a roof

FIG. 3 shows a further embodiment for the fixation of a roof foil.

FIG. 4 shows a further embodiment for the fixation of a roof foil.

FIG. 5 shows a further embodiment for the fixation of a roof foil.

FIG. 6 shows a further embodiment for the fixation of a roof foil.

FIG. 7 shows a further embodiment for the fixation of a roof foil.

FIG. 8 shows enlarged for example a profile rail according to FIG. 6.

FIG. 9 shows a profile rail, but on the outside of the container wall in a tilted position

FIG. 10 shows an attachment profile for a profile rail according to FIG. 9

FIG. 11 shows indicated an outer formwork for a container wall according to the invention.

FIG. 12 shows the attachment of a profile rail to the formwork according to FIG. 11.

FIG. 13 shows the view of the profile rail according to FIG. 12 in the direction of arrow 13.

FIGS. 14 to 17 show various views of clamping attachment elements for a profile holder according to FIG. 12 or 13 respectively.

DETAILED DESCRIPTION OF THE INVENTION

While this invention may be embodied in many different forms, there are described in detail herein a specific preferred embodiment of the invention. This description is an exemplification of the principles of the invention and is not intended to limit the invention to the particular embodiment illustrated

In FIGS. 1 a and b is indicated a container 10, which base plate 12 comprises concrete and a cylindrical wall 14, also made of concrete. The concrete wall is, for example, made with a variety of formwork elements which are arranged outside and inside. To the top at least one plastic foil 16 is spanned over the container 10, wherein its rim is fixed at the upper area on the outside of the wall 14, as will be further described below. In the container is, for example, a ferment 18. On the outside of the wall 14, a peripheral platform 20 with railings is shown. The platform consists of individual platform elements, which can also be connected to each other. The platform is not important for the invention. In FIG. 1 b furthermore is indicated a outer formwork 26 and a inner formwork 27. It serves, as mentioned, for the production of the wall, wherein the formwork is removed after construction of the concrete wall 14.

In FIG. 2 at 110 the upper part of the container wall is shown, as it can be seen in FIG. 3. It contains a clamping channel 112, that comprises a bottom 114, an upper wall 116 and a lower wall 118. At the transitions the walls are curved in the cross section. By downward and upward pointing protrusions 120 and 121 (in the cross section) respectively, a narrowed insertion slot 124 is formed to the channel 112. A clamping element in form of a flat profile 126 has approximately the same dimensions over its height and its thickness and is rounded at the edges. The thickness of the flat profile 135 is larger than the height of the insertion slot 124 and is sized, so that it is held by the inner sides of the protrusions 120, 122, when the flat profile 126 touches the lower wall 118. This is in its height or width respectively only slightly larger than the thickness of the flat profile 126, as can be clearly seen in FIG. 2. The upper wall 116 is, however, significantly higher or wider respectively than the thickness of the flat profile 126, at least twice of its thickness. Shown in broken lines, in the pivoted position of the flat profile 126, shown at 126′, it can be inserted into the channel 112 via the insertion slot 124. Before this happens, a foil 130 is wrapped around the flat profile 126. After inserting the flat profile 126 with the foil 130 and the placement of the flat profile 126 to the wall 118 a tilt back of the flat profile 126 into an approximately vertical position parallel to the insertion slot is realized by a pull on the foil 130. Thus the foil 130 is clamped in the channel 112 and can not be pulled out.

As can be seen further, the flat profile 116 comprises a notch 132, which forms a predetermined breaking point. In case of an accident the predetermined breaking point as a last instance prevents a rupture of the foil and can provide emergency relief.

It is understood, that the clamping channel 112 can also, for example, be produced from a separate profile rail, which is further described below. For the fixation of the foil the profile of the clamping channel and the clamping element in the clamping channel are essential.

In the FIGS. 3-5 a section through the upper portion of the container wall 14 is shown, which is, however, structured differently in the upper portion, as described below. It can also be seen an outer- and inner formwork 26, 27 according to FIG. 1 b in production of the container wall of concrete.

In FIG. 3 a box-shaped or in the cross section C-shaped profile rail 36 is shown, which has, for example, a shape as shown in FIG. 2. This will be further discussed below. As can be seen, the profile rail 36 is integrated in the wall 14, so that the upper side or the upper leg respectively is flush with the horizontal top of the wall 14. During the production the profile rail 36 is detachably connected to the outer formwork 26 (not shown). After forming the wall 14 naturally the formwork 26, 27 is removed, wherein beforehand the detachable connection to the outer formwork 26 is released. The profile rail 36 is than connected to the wall 14.

The profile rail consists of individual segments of specific length, which is preferably significantly smaller than the circumferential length of the container 10. Thereby, a rail segment can be connected to one or more adjacent formwork elements. The profile rail 36 or its individual segments respectively are provided with anchor portions, which, as shown at 38, extend obliquely downward into the wall 14. They are already located in the profile rail 36, when it is mounted to the outer formwork 26. In FIG. 3 arrows 40 indicate the direction of the tensile force of a foil, which is referenced as 16 in FIG. 1 b. It is fixated in the profile rail 36. This is further described below. The different angles of the pulling direction 40 result from the type of foil (gas storage foil, air-supported dome) and structural conditions. Depending on the size of the angle, load and bending force at the upper leg of the profile rail are modified.

The embodiment according to FIG. 4 differs to that according to FIG. 3 in that the profile rail 36 is embedded in a distance to the top of the wall 14. Again the profile rail 36 is first connected to the outer formwork 26. The foil, that is affixed with its rim in the profile rail 36, first extents vertically on the outside of the wall 14 and is guided obliquely upward on the wall 14 over a rounded edge 42. The edge 42 reduces the strain that occurs with the deflection of the foil.

In FIG. 9 or 12 a C-shaped profile rail is shown, the way it can be embedded in the wall 14 like in the embodiment according to FIGS. 3 and 4. Therefore, the details of this rail shall be explained below.

The profile rail 18 a according to FIG. 9, having a C-shaped cross section, comprises a web 20 a and two parallel spaced legs 22 a, 24 a. The legs are bent at 26 a. The profile rail 18 a that is shown is slightly tilted with obliquely downward pointing legs 22 a, 24 a. An insertion slot 21 (seen in the cross section) is thus in a plane pointing downward.

In FIG. 5 the profile rail 18 a according to FIG. 9 is also embedded in the wall 14, so that its upper edge is flush with the top of the wall 14. This top, however, comprises a slope, as indicated at 44. The slope is directed to the outside. The clamping rail 18 a is in turn detachably connected with the outer formwork 26, when the wall 14 is produced. Subsequently this connection is released, so that the outer formwork 26 can be removed. A tilted mounting of the clamping profile 18 a has the advantage of achieving significantly higher pull-out resistance for the foil rim and a favourable strain on the profile rail. The upper leg is essentially strained in its extending direction rather than in bending. Hence the foil rim is held particularly secure in the clamping profile 18 a.

The clamping of a foil 28 in FIG. 9 is done by an inflatable tube 30 that is inserted into the clamping channel formed by the C-shaped profile rail 18 a and subsequently inflated. The clamping is preferably at the inside of web 20 a and legs 22 a, 24 a as can clearly be seen. The inwardly curved portions 26 prevent the tube 30 from being pulled out of the clamping rail 18 a by a corresponding load.

It is also possible to embed a clamping channel in the concrete wall with a formwork. This possibility is indicated in FIG. 8. In FIG. 8 an upper profile portion 50 and a lower profile portion 52 are provided, which can be connected to each other using a screw connection 54. In the area on both sides of the screw connection the profile portions 50, 52 form a protrusion 56, which, when casting, forms a channel in the concrete wall 58, as, for example, is indicated in several of the above figures. It is understood, that a plurality of profile portions 50, 52 are provided in circumferential direction, which can be connected to each other, namely via screw connections 60 and 62 respectively. The lower profile portion 52 is also connected via a flange 64 to an underlying not shown formwork element by a screw connection 66. After casting and curing of the concrete for the construction of the wall 58 the screw connections 54, 60, 62 are released. The screw connections 60, 54, 62 comprise a screw bolt 60 and a cap nut 70. As can be seen, the cap nuts 70 remain in the wall 58, while the screw bolts 68 are unscrewed. After loosening the screw connections first the lower profile portion 52 can be removed by oblique lifting and lateral pull and then the upper profile portion 56 is removed from the so formed channel by a diagonal motion.

In FIG. 9 the profile rail 18 a is mounted to the outside container wall 10 a. At the back of the web 20 a a leg of an angle profile 12 is welded with the wall 10 a, as indicated at 16 a. As indicated at 14 a, the other leg of the angle profile 12 is anchored with the wall 10 a in an appropriate manner.

In FIG. 10 shows again the profile rail 18 a according to FIG. 9. It shall thereby no longer be described in detail. FIG. 10 also shows a fastening profile 80. It has a certain vertical length, of, for example, 0.15 m. In the cross section it is U-shaped with a web 82 and two legs, one of which is shown at 84. In the upper area of the fastening profile 80 the legs 84 are provided with a triangular recess 86. The profile rail 18 a is inserted and affixed in this in a tilted position, for example, in an angle of 45°. The fixation is, however, done only after the sections of the profile rail 18 a are bent in the correct round shape, corresponding to the outer radius of the container, to which the profile rail 18 a should be mounted. Holes 86 a are formed into the web of the fastening profile 80, so that the fastening profile 80 can be mounted vertically to the outside container wall, for example, the wall 10 a in FIG. 9, by means of screws or anchors respectively.

Instead of embedding a clamping profile in the form of a profile rail in the wall, a positive profile of plastic can be attached to the formwork, which is then removed from the wall, for example by heat or a reagent. This leaves a clamping profile in the wall with the same function as a clamping rail.

In FIGS. 6 and 7 other ways to form a clamping profile are indicated. In FIG. 6 an outer formwork element 40 a is detachably connected with a fiber concrete section 42 a, wherein the detachable connection, which must be accessible from the outside, is not shown. The fiber concrete section 42 a comprises a ready-made channel 44 a and is, in the casting, embedded in this (wall 14 a). The fiber concrete section 42 a can be ready-made. It can already be connected to the formwork element 40 a in a distance, before it comes to the work site or it can be connected to the formwork element 40 a at the work site.

For the sake of completeness it should be mentioned, that is talked of only a single formwork element or profile formwork section. It is understood, that in circumferential direction a plurality of outer formwork elements 40 a are provided and also a plurality of formwork profile sections 42 a.

FIG. 7 shows another possibility. Here, a concrete element 46 a is put on top of the concrete wall 14 b, which is provided with clamping channel 44 a. The concrete element 46 a is ready-made and comprises reinforcement 48 a that is standing downward and to the outside, which can be inserted into the soft concrete after casting the wall 14 b, for connecting the concrete element 46 a with the wall 14 b.

FIG. 11 shows indicated a formwork 200 for a container comprising a concrete wall, namely the outer formwork. The outer formwork consists of lower formwork elements 202, which are set up in a ring and thereby form the outer wall of the container, not shown. On top of the lower formwork elements 202 upper formwork elements 204 are placed and connected to each other with, for example, screw connections. For this purpose the formwork elements 202, 204 comprise aligned mounting holes 206 and 208 respectively. The upper formwork elements 204 form the upper rim of the container. They also have holes at the top, one of which is shown at 210. In addition, FIG. 11 shows a sheet-metal portion 212 that can be mounted on top of the formwork elements 204.

In FIG. 12 an upper outer formwork element 204 is indicated and also the sheet-metal portion 212 with its mounting hole 214. It can be seen that a vertical sheet-metal portion 216, which comprises a rectangular slot 218 at the upper end and a protrusion 220 at the lower end, is welded to the horizontal sheet-metal portion 212. In FIG. 12 also the cross section of a profile rail 222 is indicated, which has the form of a slightly compressed C-profile with a sloping upper wall 224 or leg, a substantially curved lower wall 226 or leg and a bottom 228. The dimensions of the upper and lower wall are such that the width of the clamping channel 230 inside the profile rail 222 is considerably larger in the upper area than in the lower area. For this purpose also the bottom 228 is arranged at an angle. The cross section of the clamping channel 230 is similar to that of FIG. 2, wherein unlike in FIG. 2 the upper wall 224 runs obliquely upwards. This provides the advantage that the profile rail 222, as shown in FIG. 9, can absorb the tensile force from the foil, not shown, as compressive load in the upper leg 224. The clamping channel 230 is adapted to receiving a flat profile (as per FIG. 2) to affix a foil in the clamping channel 230.

The sheet-metal portion 212, 216 are part of a profile holder, to hold the profile rail 222 at the formwork element 204 before embedding in the wall 232. With the help of a device, shown in FIGS. 14 to 17, a profile holder can be effectively attached to the formwork element 204. For this purpose the device according to FIGS. 14 to 17 comprises a pin 240 that is affixed to an angle section 242 of sheet-metal, for example by welding. On the leg of the angle section 242 away from the pin 240 a slot 244 is formed. A handle portion 246 is connected to the angle section 242. For the attachment of the sheet-metal 212 to the sheet-metal portion at the top of the formwork element 204 the pin is inserted through the holes 214, 210. Thus the slot 244 is oriented approximately to the sheet-metal portion 212 and the sheet-metal of the formwork element 204. By an appropriate rotation of the device according to FIGS. 14 to 17 the slot is placed over the associated sheet-metals, which are thereby clamped against each other. In this way the profile holder is securely fixed to the formwork element but can be also easily removed.

As further shown in FIG. 12, here a concrete wall 232 is already created, wherein the inner formwork elements are not shown. The concrete wall comprises reinforcements 252. In addition it can be seen that a running rail 254 with a C-section is connected to the underside of the profile rail 222 by welding. It is therefore also be held by the profile holder until the concrete is cured. The running rail 254 is used to hold one or more rollers 256 for a not shown carriage that is suspended on the outside of the wall 232 and can be run around the container using the running rail 254.

This completes the description of the preferred and alternate embodiments of the invention. Those skilled in the art may recognize other equivalents to the specific embodiment described herein which equivalents are intended to be encompassed by the claims attached hereto. 

1. Container wall, preferably made of concrete, in particular for container for storing and fermenting ferment materials, comprising a clamping channel, having an undercut near the upper edge that is open to the outside for clampingly receiving a rim of at least one foil made of plastic material that covers the container at the top, characterized in that the clamping channel (112) comprises a narrowed lateral insertion slot (124) that is formed by an upper and a lower protrusion (120, 122), which height is less than the height of an oblong insertion profile (126), to which the foil (130) can be wrapped around, that can be inserted into the clamping channel, wherein the cross-sectional dimensions of the channel (112), the insertion slot (124) and the insertion profile (126) are such that the insertion profile (126) can be inserted into the clamping channel (112) trough the entry slot in an oblique orientation thereto and when the foil (130) that is wrapped around the insertion profile is under tension, the insertion profile is retained in the clamping channel by the protrusions (120, 122) against moving out of the clamping channel in an approximately parallel orientation to the protrusions.
 2. Container wall according to claim 1, wherein the insertion profile (126) comprises a predetermined breaking point (132), wherein the insertion profile (126) bents essentially around a horizontal axis when a predetermined force acts on the foil (130).
 3. Container wall, preferably made of concrete, in particular for container for storing and fermenting ferment materials, comprising a clamping channel near the upper edge for fixating a rim of at least one foil made of plastic material that covers the container at the top, with an annular clamping profile arranged in the upper area of the container wall that comprises the inner clamping channel with an insertion slot that is open to the outside, wherein the foil rim can be inserted into the clamping channel through the insertion slot and can be affixed in the clamping channel using an oblong clamping element, wherein the foil area near the wall forms an angle to the horizontal and wherein the clamping profile has an upper and a lower leg, characterized in that the upper leg facing the foil is tilted so that up to the maximum allowable tensile strain of the foil it extends approximately parallel or in a small angle to the foil so that a force from the foil directed to the upper leg acts in its larger part as a compression load on this leg.
 4. Container wall according to claim 1, characterized in that the clamping channel or the clamping profile respectively is formed by a profile rail (18 a, 36, 50, 222) that has a U-shaped or C-shaped cross section and the rail is preferably arranged tilted so that, seen in the cross section of the rail, its insertion slot lies in a plane that is directed obliquely downward.
 5. Container wall according to claim 1 4, wherein the clamping channel or the clamping profile respectively is formed into the material of the concrete wall.
 6. Container wall according to claim 5, wherein a profile rail (36, 56, 222) is at least partially casted into the concrete wall.
 7. Container wall according to claim 4, wherein the profile rail (18 a, 222) is mountable to the container wall from outside.
 8. Container wall according to claim 3, wherein the angle of the plane of the insertion slot is approximately 45° in respect to the container wall that extends overhead thereto.
 9. Container wall according to claim 7, wherein vertical mounting profiles (80) can be mounted at intervals to the outside of the container wall, which preferably comprise a recess (86) adapted to the cross section of the profile rail (18 a, 36), in which the profile rail (18 a, 36) can be inserted and affixed.
 10. Container wall according to claim 9, wherein the mounting section is U-shaped in the cross section, the recess (86) is formed in the legs and the web (82) of the mounting section can be connected to the container wall, preferably using screw holes (86 a) in the web for receiving fastening screws.
 11. Container wall according to claim 9, wherein a holding means for the profile rail (18 a, 222) comprise an angle profile (12), which is connected to the rail (18 a, 222) in a force fit, wherein the angle profile is mountable to the container wall (10 a).
 12. Container wall according to claim 6, wherein the upper edge or the upper leg of the profile rail is flush with the container wall (14).
 13. Container wall according to claim 6, wherein the top (44) of the container wall rises towards the outside.
 14. Container wall according to claim 6, wherein the profile rail (36) arranged in a distance below the top of the container wall (14) and the outer edge of the wall top is rounded.
 15. Container wall according to claim 4, wherein the profile rail is composed of two or more rail sections.
 16. Device according to claim 6, wherein the profile rail (56) consists of rail sections, split in the longitudinal plane, that are positively connected to each other in the web area.
 17. Container wall according to claim 1, wherein the clamping channel or the clamping profile (36, 18 a, 222) is formed by a permanent formwork.
 18. Container wall according to claim 17, wherein the permanent formwork is of a rail type (36, 18 a, 222) or consists of rail sections respectively.
 19. Container wall according to claim 17, wherein the permanent formwork consists of shell-like fiber concrete portions (42 a, 46 a), which are cast into the concrete wall (14 a) or placed onto the concrete wall respectively.
 20. Container wall according to claim 17, wherein a positive form of a clamping profile that is U-shaped or C-shaped in the cross section can be detachably mounted to outer formwork elements (26) and the positive form is made of a plastic material that can be removed from the container wall by heat or a chemical substance.
 21. Outer formwork for the construction of a container wall of concrete that consists of annular arranged flat formwork elements, in particular for the construction of a container wall according to claim 1, wherein the formwork elements (26, 27) comprise mounting means for the detachably mounting of a formwork element for a clamping channel or a clamping profile at least partially within the wall or a profile rail, wherein the formwork profile or the profile rail is formed for the clampingly fixation of a rim of a foil that covers the container.
 22. Formwork according to claim 21, wherein the formwork elements or the profile rail elements (36) respectively can be connected with the formwork elements (30), wherein the length of the rail elements preferably is a multiple of the length of a formwork element (30).
 23. Formwork according to claim 21, wherein the shell-like fiber concrete portions (42 a) can be detachably connected to formwork elements (40 a) and the detachable connection is accessible from outside.
 24. Formwork according to claim 21, wherein the formwork profile consists of an upper and a lower profile portion (50, 52), which together form a positive form (56) for a clamping channel or a clamping profile with undercut respectively, wherein the profile portions (50, 52) can be detachably connected, so that after releasing the connection the profile portions (50, 52) can one by one be removed from the clamping channel or respectively the clamping profile formed in the concrete.
 25. Formwork according to claim 24, wherein the detachable connection of the profile portions comprise at least one screw bolt (68) and a cap nut (70), wherein the cap nut (70) is located on that side of the container wall with the profile portions (50, 52).
 26. Formwork according to claim 21, wherein the mounting means comprise at least one hole at the top of the formwork elements as well as a plug- or screw connection for a profile holder, wherein the profile holder is designed so that it temporarily fixates a profile rail or a formwork rail to the formwork elements, after curing of the concrete, however, the profile rail or the formwork rail can be brought out of engagement with the formwork element by releasing the mounting means and tilting movement with the profile rail or the formwork rail respectively.
 27. Outer formwork according to claim 26, wherein the profile holder comprise a first sheet-metal portion, which engages in an approximately right angle behind protrusions of the profile rail or of the formwork rail, the protrusions limiting an insertion slot for the foil, and comprising a transversally second sheet-metal portion, which is placeable on top of the formwork and comprises a mounting hole that is aligneable to the hole in the formwork element.
 28. Outer formwork according to claim 26, wherein the plug-connection comprises a pin and a clamping portion connected thereto for the clampingly fixation of the second sheet-metal portion at the top of the formwork element by rotation of pin and clamping portion.
 29. Outer formwork according to claim 21, wherein below the top of the formwork elements and below the clamping profile or the formwork profile C-shaped running rail elements can be connected to the formwork elements.
 30. Outer formwork according to claim 29, wherein the running rail elements are connected to the profile rail elements, preferably by welding. 